JPH11268563A - Seat sliding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat sliding device for suppressing the occurrence of an abnormal sound between a link and the end part of an operating bar, or the playing of the operating lever, moreover simplifying the constitution of the whole device, and lowering a price. SOLUTION: A guide hole, for slidably engaging with the end part of an operating lever 3, is formed on a link 38 for connecting between a lock mechanism 30 and the end part of the operating lever 3. A resin-made ring bush 39 as a buffering member is inserted into the guide hole, and a facing surface part 39A facing the end part of the bar 3, and an elastic piece part 39B for press-contacting the upper surface of the bar 3, are formed on the bush 39.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat slide device for a vehicle or the like, and more particularly, to a seat slide device extending in a lateral direction below a seat in order to operate a lock mechanism between a lower rail and an upper rail. The present invention relates to a seat slide device provided with an operation bar that operates.

[0002]

2. Description of the Related Art As this kind of seat slide device,
For example, those described in JP-A-8-295164 and JP-A-9-48264 are known.

[0003] The operation bar in such a sheet slide device is also called a towel bar because it is substantially U-shaped in a plane, and the device itself is also called a towel bar type slide device or the like. The left and right lock mechanisms are locked and unlocked. The left and right lock mechanisms are capable of locking and unlocking the left and right upper rails on the seat bottom side with respect to the left and right lower rails on the floor side, and the left lock mechanism is provided with a left lower rail and a left upper rail. , And the right locking mechanism is configured between the right lower rail and the right upper rail. Both ends of the operation bar are rotatably supported at the forward portions of the left and right upper rails, and an intermediate portion thereof extends in a substantially horizontal left and right direction. Both ends of the operation bar are connected to the left and right lock mechanisms. When the operation bar is rotated upward, the locks of the left and right lock mechanisms are synchronized so that the seat can be slid in the front-rear direction. When the operation bar is returned downward, the left and right lock mechanisms are synchronously locked to lock the seat at the slide adjustment position.

In such a seat slide device,
For example, a rod that is rotatable around a longitudinal axis at a fixed position of an upper rail and a lock mechanism is locked and unlocked in accordance with the rotation direction of the rod is the one in which the The rod and the end of the operation bar are connected by a link. That is, the proximal end of the link is attached to the rod, and the distal end of the link is engaged with the operation bar, whereby the lock mechanism is operated in accordance with the rotation direction of the operation bar. In such a configuration, since the tip of the link that rotates about the longitudinal axis and the end of the operation bar that rotates about the horizontal axis engage, the rotation of the operation bar Depending on the location,
The engagement position between the tip of the link and the end of the operation bar is shifted in the longitudinal direction of the link.

Conventionally, a seat slide device provided with such a link has a structure in which a steel link and a steel operation bar are directly engaged.

[0006]

However, in the above-mentioned conventional seat slide device, since the steel link and the steel operation bar are directly engaged, rattling or abnormal noise is generated at the engaged portion. There was a fear. In order to prevent this, the operating bar is urged by a spring or the engaging portion of the link and the operating bar is pressed so that the engaging portion between the link and the operating bar is elastically and strongly pressed. There is a problem that a configuration for guiding the displacement with high accuracy is required, which complicates the configuration of the entire apparatus and increases the cost.

SUMMARY OF THE INVENTION It is an object of the present invention to suppress generation of abnormal noise and rattling at an engagement portion between a link and an end portion of an operation bar, and to further simplify the configuration of the entire apparatus and reduce the cost. It is an object of the present invention to provide a seat slide device that can perform the above operations.

[0008]

A seat slide device according to the present invention is characterized in that the left and right upper rails attached to the left and right bottoms of the seat and extend in the front-rear direction of the seat, and each of the left and right upper rails is Left and right lower rails that slide freely in the front and rear direction of the seat,
An operation bar that is formed in a substantially planar U shape, and whose both ends are pivotally supported by the left and right upper rails so as to be rotatable around a left-right axis, according to the rotation direction of the operation bar,
In a seat slide device including a left and right lock mechanism capable of locking and unlocking the left and right upper rails with respect to each of the left and right lower rails, at least one of the left and right lock mechanisms has a base end. The upper rail is rotatably supported about an axis substantially along the front-rear direction, and is connected to the operation bar via a link that has a distal end engaged with an end of the operation bar,
At the tip of the link, a resin cushioning member having an opposing surface facing the end of the operation bar and an elastic piece elastically pressed against the end of the operation bar is attached. Features.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. This example is an application example as a seat slide device for a right seat of a vehicle.

In the perspective view of the entire apparatus shown in FIG.
Are left and right slide mechanisms. The left slide mechanism 1 is provided on the lower left side of the right seat of the vehicle, that is, toward the center of the vehicle (inner side). (Outer side). These left and right slide mechanisms 1
2 is related by an operation bar 3 also called a towel bar and a wire 4 as a connecting member. In the following, left and right slide mechanisms 1 and 2, operation bar 3,
The configuration of the wire 4 will be described separately.

(Left Slide Mechanism 1) As shown in FIGS. 2 to 6, the left slide mechanism 1 includes a lower rail 10, an upper rail 20, and a lock mechanism 30.
Is provided. The lower rail 10 is fixed on the floor in the vehicle by front and rear brackets 11 and 12. The upper rail 20 is attached to the left bottom portion of the seat, and is guided by the lower rail 10 so as to be slidable in the front-rear direction. In the case of this example, as shown in FIG. 5, an upper rail 20 having a substantially inverted T-shaped cross section formed by combining two plates is slidably guided inside a lower rail 10 having a substantially U-shaped cross section. . Inside the lower rail 10,
Rollers and sliders, not shown, are provided so that the upper rail 10 can slide smoothly. At the rear end of the upper rail 20, a plate 21 for forming a seat belt fastening portion (not shown) is connected. 13 is a cap attached to the rear end of the lower rail 10.

The lock mechanism 30 locks the upper rail 20 at an arbitrary slide adjustment position. In this embodiment, the lock mechanism 30 locks and unlocks the upper rail 20 in accordance with the rotation direction of the rod 31. That is, in the bearing portions 32A, 32B, and 32C (see FIG. 3) of the bracket 32 connected to the upper rail 20, the rod 31 is moved in the directions indicated by arrows A1 and A2 about the longitudinal axis (see FIGS. 5 and 6). Is rotatably supported on the
A latch 33 is attached to the rod 31, and a plurality of lock holes 10 </ b> A are formed on the side of the lower rail 10. Then, when the rod 31 is rotated in the direction of the arrow A1, the latch 33 is fitted in the lock hole 10A opposed thereto to lock the upper rail 20 as shown in FIG. 6, and the rod 31 is moved in the direction of the arrow A2. When rotated, the latch 33 is disengaged from the lock hole 10A and
Is to be unlocked. The rod 31 is positioned between the rear end of the rod 31 and the upper rail 20 by an arrow A.
A torsion coil spring 34 biasing in one direction is attached.

A nut 35 is welded to a fixed position inside the bent portion 32D (see FIGS. 3 and 5) of the bracket 32. The left end 3A of the operation bar 3 described later is rotated with respect to the nut 35. Stud bolt 3 to support freely
6 is screwed. In FIG. 5, reference numeral 37 denotes a resin bush. A link 3 is provided at the tip of the rod 31.
8 is attached, and a portion on the left end 3A side of the operation bar 3, which will be described later, is slidably fitted in a guide hole 38A having a substantially elliptical shape formed in the link 38. A ring bush 39 made of resin having a substantially elliptical planar shape is fitted in the guide hole 38A.
Smooth sliding of the operation bar 3 in the longitudinal direction inside is ensured. The ring bush 39 functions as a buffer member as described later, and prevents rattling and generation of abnormal noise. A lower end of the connection link 40 is attached to an intermediate portion of the rod 31, and a hook portion 4A on the left end side of the wire 4 described later is connected to a connection hole 40A at the upper end.

(Right slide mechanism 2) The left slide mechanism 2 is provided with a lower rail 50, an upper rail 60, and a lock mechanism 70 as shown in FIGS. 7 to 10 and FIG. ing. The lower rail 50 is fixed on the floor in the vehicle by front and rear brackets 51 and 52. The upper rail 60 is attached to the right bottom of the seat, and is guided by the lower rail 50 so as to be slidable in the front-rear direction. In the case of this example, as shown in FIG. 10, an upper rail 60 having a substantially U-shaped cross section is slidably guided outside the lower rail 50 having a substantially U-shaped cross section. Rollers and sliders (not shown) are provided between the lower rail 50 and the upper rail 60 so that the upper rail 60 can slide smoothly. 53 is a cap attached to the rear end of the lower rail 50.

The lock mechanism 70 locks the upper rail 60 at an arbitrary slide adjustment position. In this embodiment, the lock mechanism 70 locks and unlocks the upper rail 60 in accordance with the rotation direction of the rod 71. That is, the bearing portion 7 of the plate 72 coupled to the upper rail 60
2A and 72B (see FIGS. 7 and 8)
1 is rotatably supported in the directions of arrows B1 and B2 (see FIGS. 9 and 10) about an axis in the front-rear direction, and a latch 73 is attached to a rod 71 thereof. A plurality of lock holes 50A are formed. Then, when the rod 71 is rotated in the direction of arrow B1, the latch 73 is fitted into the opposing lock hole 50A to lock the upper rail 60 as shown by the solid line in FIG. When rotated in the direction B2, the latch 73 is disengaged from the lock hole 50A and unlocks the upper rail 60, as indicated by the two-dot chain line in FIG. The upper end of the connection link 74 is attached to the distal end of the rod 71, and a hook 4B on the right end side of the wire 4 described later is connected to a connection hole 74A at the lower end. A torsion bar 75 for urging the rod 31 in the direction of arrow B1 is attached between the connection link 74 and the plate 72.

A bracket 76 is attached to the side of the upper rail 60, and the bracket 7
As shown in FIG. 13, the right end 3 of the operation bar 3 described later
A support pin 77 for rotatably supporting B is implanted. The support pins 77 are shown in FIGS.
As shown in (c), the length is such that the right end 3B of the operation bar 3 can move in the left-right direction. Reference numeral 78 denotes a resin bush.

(Operation Bar 3) The operation bar 3 is substantially U-shaped.
And both ends 3A, 3B are
In addition to being flattened, there are formed holes rotatably supported by the bolts 36 and the support pins 77, and bushings 37 and 78 are fitted in these holes. The intermediate portion of the operation bar 3 extends horizontally between the left and right slide mechanisms 1 and 2 and is vertically rotated about the same horizontal axis of the bolt 36 and the support pin 77. ing. A portion on the left end 3A side of the operation bar 3 is passed through a ring bush 39 attached to the guide hole 38A of the link 38.

When attaching the operation bar 3, FIG.
As shown in FIG.
After passing through the inside, it is pivotally supported by the bent portion 32 </ b> D of the bracket 32 by the bolt 36. In that case, link 3
8, a ring bush 39 is fitted in the guide hole 38, a nut 35 is welded to the bent portion 32D of the bracket 32, and the bolt 36 is attached to the left end 3A of the operation bar 3
The nut 35 passes through the bush 37 fitted in the hole of
Screwed on. On the other hand, the right end 3B of the operation bar 3 to which the bush 78 is fitted is inserted into a support pin 77 implanted in a bracket 76 to be supported by the shaft. FIG.
FIG. 5 is an exploded perspective view of only the shaft support portions of both ends 3A and 3B of the operation bar 3. When the seat slide device of the present embodiment is mounted on a vehicle, for example, the left slide mechanism 1 that supports the left end 3A of the operation bar 3 and the right slide mechanism 2 are separately configured. Those slide mechanisms 1, 2
When the is mounted in the vehicle, the right side 3B of the operation bar 3 can be pivotally supported by the support pin 77 of the right slide mechanism 2.

(Wire 4) The wire 4 has hook portions 4A and 4B at both ends thereof connected to the connection holes 40 of the connection links 40 and 74.
A, 74A and their connecting links 40, 7
It is hung between four. The connection hole 40A is the connection link 40
And a connecting hole 74A is formed at the upper end of the connecting link 74.
Is formed at the lower end of the wire 4 so that both ends of the wire 4 are shifted in the up-down direction and laid. Accordingly, the wire 4 is moved in conjunction with the rotation of the rod 31 in the direction of the arrow A2,
Is rotated in the direction of arrow B2. Further, since the wire 4 itself is flexible, it is inevitably configured to absorb torsion and distortion between the left and right ends.

Next, the operation will be described.

Normally, the rods 31 and 71 are rotated in the directions of arrows A1 and B1 by the urging forces of the torsion coil spring 34 and the torsion bar 75, respectively.
At 0A, the seat is locked with the upper rails 20, 60 in the current sliding position. Link 38
6 is held together with the rod 31 at the rotational position in the direction of arrow A1 as shown in FIG. 6, and the operation bar 3 is located in the guide hole 38A of the link 38 on the right side in FIG.
And the support pin 77 is held at a lower rotation position around the support pin 77.

When adjusting the slide of the seat, first,
The operator holds the intermediate portion of the operation bar 3 and rotates the operation bar 3 around the bolt 36 and the support pin 77 above the arrow C. With such rotation, the operation bar 3 moves the link 38.
While sliding to the left in FIG. 6 in the guide hole 38A, the link 38 is rotated together with the rod 31 in the direction of arrow A2 against the torsion coil spring 34. As a result, the latch 33 comes off from the lock hole 10A. at the same time,
The connecting link 74 is pulled by the wire 4, and the rod 71 is rotated together with the connecting link 74 in the direction of arrow B2 in FIG.
3 comes off the lock hole 50A.

After that, the upper rail 2 together with the seat
After adjusting 0 and 60 forward and backward, the operation force of the operation bar 3 is released. As a result, due to the weight of the operation bar 3 and the urging force of the torsion coil spring 34, as shown in FIG. 6, the operation bar 3 returns to the lower position, and the latch 33 rotates and returns together with the rod 31 in the direction of arrow A1. The lock holes 30A fit into the corresponding lock holes 30A. Further, since the connecting link 40 also returns in the direction of arrow A1, the wire 4 is loosened, and the urging force of the torsion bar 75 causes the rod 71 together with the connecting link 74 to return in the direction of arrow B1 to cause the latch 73 to return. It fits into the lock hole 50A. As a result of these,
The seat is locked together with the upper rails 20 and 60 in the slide adjustment position.

As described above, the lock mechanism 30 of the left slide mechanism 1 is directly locked and unlocked by the left end 3A side of the operation bar 3, while the lock mechanism 70 of the right slide mechanism 2 is Locking and unlocking are indirectly performed via the lock mechanism 30 and the wire 4. That is, the left and right lock mechanisms 30 and 70 are not directly connected by the relatively high-rigidity operation bar 3 but are only connected by the flexible wire 4. The right end 3B is only supported by a shaft slidably in the left-right direction.

Since the left and right lock mechanisms 30 and 70 are merely connected by the flexible wire 4 that absorbs twist and distortion between the left and right ends, it is assumed that there is an error in the mounting accuracy of the device itself. When the positional relationship between the left and right slide mechanisms 1 and 2 is slightly shifted in the front-rear direction or the up-down direction due to dimensional errors of the components, deformation of the components during use, etc.
Is absorbed, and smooth operation of the left and right lock mechanisms 30 and 70 is secured. Further, if the left slide mechanism 1 is displaced so as to be close to the right front, that is, the right slide mechanism 2 due to an impact load applied to the plate 21 from the seat belt, the wire 4 is moved in a direction in which both ends thereof are close to each other. It is displaced and loosened, and the locked state of the left and right lock mechanisms 30, 70 is maintained.

Further, by shifting both ends of the wire 4 in the vertical direction or in the front-rear direction as in the present embodiment, tension is not immediately applied to the wire 4 when the right and left slide mechanisms 1 and 2 are relatively displaced. Thus, malfunction of the lock mechanisms 30, 70 can be avoided. In particular, by shifting the left end of the wire 4 toward the rear from the right end, when an impact load is applied to the plate 21 from the seat belt and the left slide mechanism 1 is displaced forward, the wire 4 is loosened and Malfunction of the lock mechanisms 30, 70 is avoided. Further, when the device of this example is provided on the left seat of the vehicle, the plate 21 to which the impact load from the seat belt is applied is attached to the right upper rail 60. In this case,
Conversely, the right end of the wire 4 may be shifted rearward from the left end.

Further, as in the present embodiment, the lock mechanism 30 and the wire 4 are provided at a position closer to the front than the plate 21 to which the impact load from the seat belt is applied.
Even if a peeling load is applied from the plate 21 to the rear end portion of the upper rail 20, the influence on the lock mechanisms 30 and 70 can be suppressed.

Further, since the right end 3B side of the operation bar 3 is slidably supported in the left and right direction with respect to the right upper rail 60, if the mounting accuracy error of the device itself, the dimensional error of the component parts, When the distance between the left and right slide mechanisms 1 and 2 changes due to deformation of components during use and the like, the change is caused by the right end 3B of the operation bar 3.
Is absorbed by the side bearing part. That is, the position of the right end 3B of the operation bar 3 is shifted as shown in FIGS. 13B and 13C based on the position of FIG. . Therefore, even if the positional relationship between the left and right slide mechanisms 1 and 2 is slightly shifted or the operation bar 3 is slightly deformed, smooth rotation of the operation bar 3 is ensured.

FIG. 15, FIG. 16, and FIG. 17 are explanatory views of a connection portion between the link 38 and the operation bar 3. FIG. As shown in FIGS. 17A and 17B, a resin ring bush 39 fitted in the guide hole 38A of the link 38 has
An opposing surface portion 39A extending annularly along the inner peripheral edge of the guide hole 38A and facing the outer peripheral portion of the operation bar 3 and an elastic piece portion 39B pressed against the upper surface portion of the operation bar 3 are integrally formed. As shown in FIGS. 17A and 17B, the opposing surface portion 39A has a form in which the inner peripheral surface is curved. The elastic piece 39B is inclined so as to form a predetermined angle toward the inside of the guide hole 38A as shown by a solid line in FIGS. 17A and 17B, and an operation bar is provided in the guide hole 38A. 3 by fitting the end of FIG.
It is elastically deformed upward as shown by the two-dot chain line in (a) and (b), and is pressed against the upper surface of the operation bar 3.

As described above, when the operation bar 3 is rotated, the operation bar 3 slides in the guide hole 38A of the link 38, and the rod 31 moves through the link 38.
Is rotated. When the operation bar 3 is at the down position in the non-operation state as shown in FIGS. 15 and 16, the end of the operation bar 3 is substantially perpendicular to the link 38 as shown in FIG. It becomes a positional relationship, and the operation bar 3 is indicated by an arrow C
FIG. 17 (b) when in the up position operated in the direction
The positional relationship is such that the end of the operation bar 3 is inclined with respect to the link 38 as shown in FIG. Thus, the end of the operation bar 3 slides in the guide 38A while changing the positional relationship with the link 38.

When the end of the operation bar 3 slides, it comes into sliding contact with the inner peripheral surface of the facing surface portion 39A of the ring bush 39, and the steel link 38 is indirectly connected via the resin ring bush 39. Operation bar 3 made of steel
Will guide you. Therefore, generation of abnormal noise due to direct contact between steel products is prevented. In addition, the elastic piece 39B of the ring bush 39 that is in pressure contact with the upper surface of the operation bar 3 absorbs the vibration of the operation bar 3 with its elastic deformation and suppresses the rattling of the operation bar 3. Become. Thus, the ring bush 39 functions as a buffer member.

(Other Embodiments) A support pin 77 for pivotally supporting the right end 3B of the operation bar 3 may be implanted so as to protrude outward from the bracket 76 as shown in FIG. In the case of this example, the nut 81 is attached to the male screw portion at the tip of the support pin 77.
Are screwed, and the washer 82 and the bracket 76
In between, the displacement of the right end 3B of the operation bar 3 is allowed.

The upper and lower elastic pieces 39 as shown in FIG.
B may be formed so that these elastic pieces 39B are pressed against the upper surface and the lower surface of the operation bar 3. As described above, the number and form of the elastic pieces 39B are arbitrary. For example, the elastic pieces 39B may be formed intermittently or continuously along the circumferential direction of the ring bush 39, or may be formed on the right side of the ring bush 39 in FIG. It may be formed. Also, the facing surface portion 39
A only needs to be formed at a position where it contacts the end of the operation bar 3 at least in the rotation direction of the operation bar 3, and is not limited to only the annular form as in the above-described embodiment. Therefore, the form of the buffer member situation is not limited to the annular form such as the ring bush 39 at all.

Further, the connecting member for connecting the left and right locking mechanisms 30 and 70 is of a type that absorbs distortion between the left and right ends. It is also possible to use a steel rod or the like curved into the shape shown in FIG. Further, the connection member such as the wire 4 is eliminated, and the right lock mechanism 70 is locked and unlocked via the link 38 in accordance with the rotation direction of the operation bar 3, similarly to the left lock mechanism 30. May be configured.

[0035]

As described above, according to the seat slide device of the present invention, a buffer member made of resin is attached to the link connecting the lock mechanism and the end of the operation bar, and the operation bar is attached to the buffer member. By forming an opposing surface that faces the end of the elastic bar and an elastic piece that presses against the end of the operation bar,
The opposing surface of the cushioning member is interposed between the opposing surfaces of the link and the operation bar to prevent the generation of abnormal noise, and the elastic piece of the cushioning member absorbs the vibration of the operation bar, thereby reducing the play of the operation bar. Can be suppressed, and the configuration of the entire device can be simplified.
And cost reduction can be achieved.

A guide hole is formed at the end of the link so as to be slidable with the end of the operation bar, and an opposing surface facing the end of the operation bar is formed on the inner peripheral surface of the guide hole. By fitting the ring bush as a cushioning member, it is possible to restrict the displacement of the end portion of the operation bar in various directions while preventing generation of abnormal noise.

Further, the elastic piece of the cushioning member urges at least the end of the operation bar downward, so that the urging force of the elastic piece can be effectively used as a holding force for holding the operation bar in the non-operation position. Can be used.

[Brief description of the drawings]

FIG. 1 is a perspective view of the entire seat slide device of the present invention.

FIG. 2 is a view taken in the direction of the arrow II in FIG.

FIG. 3 is a view taken in the direction of the arrow III in FIG. 2;

FIG. 4 is a view taken in the direction of the arrow IV in FIG. 3;

FIG. 5 is a sectional view taken along the line VV of FIG. 3;

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 3;

FIG. 7 is a view taken in the direction of the arrow VII in FIG. 1;

FIG. 8 is a view taken in the direction of the arrow VIII in FIG. 7;

FIG. 9 is a view on arrow IX of FIG. 7;

FIG. 10 is a sectional view taken along line XX of FIG. 7;

FIG. 11 is an exploded perspective view of the entire seat slide device of FIG. 1;

FIG. 12 is an exploded perspective view of only a pivot portion of the operation bar in the seat slide device of FIG.

13 (a), (b), and (c) are cross-sectional views for explaining the operation of the right end pivot portion of the operation bar in the seat slide device of FIG.

FIG. 14 is a sectional view of a main part according to another embodiment of the present invention.

FIG. 15 is a perspective view of a connection portion between an operation bar and a left lock mechanism in the seat slide device of FIG. 1;

FIG. 16 is a view taken in the direction of the arrow XVI in FIG. 15;

17A and 17B are cross-sectional views of a connecting portion between the operation bar of FIG. 15 and a left lock mechanism, wherein FIG. 17A is a cross-sectional view when the operation bar is not operated, and FIG. 17B is a cross-sectional view when the operation bar is operated. It is.

FIG. 18 is a cross-sectional view of a connection portion between an operation bar and a left lock mechanism according to another embodiment of the present invention.

[Explanation of symbols]

 1, 2 slide mechanism 3 operation bar 4 wire (connection member) 10, 50 lower rail 20, 60 upper rail 30, 70 lock mechanism 35 nut 36 bolt 38 link 39 ring bush (buffer member) 39A opposing surface portion 39B elastic piece portion 77 support pin

Claims (3)

[Claims] 1. A left and right upper rail attached to the left and right bottoms of a seat and extending in the front-rear direction of the seat; and a left and right upper guide slidably guiding each of the left and right upper rails in the front-rear direction of the seat. A lower rail, an operation bar formed in a substantially plane U-shape, and both ends of which are pivotally supported by the left and right upper rails so as to be rotatable around a left-right axis, according to a rotation direction of the operation bar. And a left and right lock mechanism capable of locking and unlocking the left and right upper rails with respect to each of the left and right lower rails, wherein at least one of the left and right lock mechanisms is a base end. A part is rotatably supported on the upper rail so as to be rotatable about an axis substantially along the front-rear direction, and a tip part is engaged with an end part of the operation bar. A front surface portion facing the end portion of the operation bar and an elastic piece portion elastically pressed against the end portion of the operation bar are formed at a distal end portion of the link; A seat slide device comprising a resin-made buffer member attached thereto. 2. A guide hole is formed at a distal end of the link so as to be slidable relative to an end of the operation bar, and the cushioning member is fitted to the guide hole and provided on an inner peripheral surface. The seat slide device according to claim 1, wherein the opposed surface portion is a ring bush formed. 3. The operation piece according to claim 1, wherein the elastic piece of the cushioning member presses at least the upper surface of the end of the operation bar to urge the operation bar downward. Seat slide device.